mavericks contacts

Hi everybody there!

Let me explain the problem:

I installed Mavericks a couple of days ago without entering my Apple ID

Mac is working fine, but I'm having a big problem with my address book:

1) when I open it it displays "0" contacts

2) when I receive an E-Mail, it displays the contact in my address book >> I have access to the address book only from my eMail

3) In the metadata folder (library/application support/address book) the contact are still existing

It looks like the address book would not access the data...

Any idea how I can fix this problem?

I am using an invoicing software which is connected to the address book ("billing") and I can't manage my invoice at the moment, which is quite disappointing.

Thank you in advance for your friendly suggestions!

Silvio